Question

(2x + 3y = 12
1 x - 2y = -1​

Answer 1

Método: Sustitución

{2x + 3y = 12

{1x - 2y = -1

{2x + 3y = 12

{x = -1 + 2y

2(-1 + 2y) + 3y = 12

-2 + 4y + 3y = 12

-2 + 7y = 12

7y = 12 + 2

7y = 14

y = 2

x = -1 + 2 × 2

x = -1 + 4

x = 3

(x, y) = (3, 2)

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